Photographic-printing apparatus.



H. BURKE & D. JAMES. 'PHOTOGBAPHIG PRINTING APPARATUS.

APPLICATION FILED JAE. 2. 1909.-

Patented Apr. 11, 1911.

4 BHEETB-SHEET 1.

lllllllllll H. BURKE & D. JAMES; PHOTOGBAPHIG PRINTING APPARATUS. APPLICIATIOH FILED IAN. 2. 190% 989,330. Patented Apr. 11, 191-1..

4 SHEETS-SHEET 2.

. H. BURKE'& D. JAMES.

PHOTOGRAPHIG PRINTING APPARATUS.

I prmourlon rum) an. 2. 1909.

9 9,330, Patented Apr. 11,1911.

4 slums-sum a.

H; BURKE & D. JAMES. 'PHOTOGRABHIG PRINTING APPARATUS.

APPLICATION FILED JAN. 2. 1909.

Patented Apr. 11, 1911.

4 BHEETHHBET 4.

IIIII mm, ,1, mummy-"mm mnankiibnnnnnnnaawu1pna UNITED STATES PATENT OFFICE.

HENRY BIJ'RKE'AND DAVID JAMES, OF CHICAGO, ILLINOIS, ASSIGNORS TO BURKE 86 JAMES, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

.PHOTOGRAPHIC-PRINTIN 'G APPARATUS.

Specification of Letters Patent. Patented Apr. 11, 1911.

Application filed January 2, 1909. Serial No. 470,813.

To all whom it may concern:

Be it known that we, HENRY BURKE and DAVID JAMES, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain .new and useful Improvements in Photographic-Printing Apparatus; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and is compact and easily operated and con-' use the same.

Thisfinvention relates to a novel construe-'- tion in a photographic printing apparatus for use in making artificial light prints, the object being to provide an apparatus which trolled, and consists in the features of construction and combinations of partshereim' after fully described and claimed. I

In the accompanying drawings illustrating our invention: Figure 1;- is a top plan'view of a photographic printing apparatus constructed in accordance with our in- 'vention. -Fig. -.2 is a similar view shoW-.

- ing a modified form of construction. Fig.

3 is a central vertical section of the apparatus on the line 3-3 of Fig. -.1. Fig. +4:- is a vertical transverse section of the same on the'line'H of Fig. 3. Fig. -'-5, is a central'vertical'longitudinal sec: tionion the line 5-5 of Fi Fig. .6 is a fragmentary detai section on the line 66 of Fig. -3- showing in front elevation the electric switch employed. Fig.-

--7-- is a section on the line 7-7 of Fig. 6? showing the switch inside 'elevation.

. Fig. 8 is a fragmentary detail vertical section on'the line 8-8 of Fig.4- showing an extension member employedto operate the switch' by pressure. of the finger. Fig. -9-'is a detail perspective view showing a spring hinge employed.

In making prints from photo aphicnegatives with. the aid of artificia light,

care must be exercised in'handlin the paper so as not to expose the same to ight other than deep yellow to which it is not sensitive.

Rapidity and ease of handling-are also essential and are possible only where caution against accidental exposure is. obviated.

Furthermore it is desirable that in printing from negatives such devices as.vignette's or means for throwing shade on parts of the negative may be readily resorted to in order is adapted to press the paper uniformlyupon that artistic effects may be readily produced.

The object of our invention is to provide an apparatus which will enable prints to be made with great ease and rapidlty and enables vignettes and the like to be easily and quickly applied. I

The apparatus comprises a rectangular box 1 which may be made of any suitable material which is provided in its top wall with an opening -2- the edges of the wall of which are rabbeted on their upper corners to'receive the edge portions of a plane 3 of glass. Said box is also provided in' its frdnt and rear walls with slots 4 and '5 which are adapted to be closed by the slides 6 movable in guides 7' and isfurther provided in its bottom with a slot adapted to be closed by a slide 8-.' In the inner faces of the side walls of the box are a plurality of horizontally disposed grooves 9- opposite the. slot 4= and in a lever 11'- is pivotally secured by means 'of spring hinges -12-. A stop -13 limits the upward movement of the said lever -'11-, the latter carrying apresser plate 14 between its ends which the negative supporte on the pane -3- when the said lever is. depressed against the action of the hinges.--12 Said presser plate 14 is removabl secured to the lever .11 by means of t e '.thumb-screw 15 mounted in an adjustable plate 16 mov- 95 able in' guides with side rails of said lever andis m'terchan cable with a number of t varying sizes 0 said plates on boards. 'Mounted within the said box 1 and preferably uponthe side walls thereof are 100 I two or -more electric incandescent lamps 17-and .-18, the former being referably of a deepv amber shade and the utter clear glass. The bulbs of the lamp or lamps ''18 are projected so that they are dis 105 posed midway between the side walls and so that the source of printing light is midway 'of the ends of the opening -2 of the box.

The lam -'-17 is preferably smaller and may be 'sposed in-any convenient place in 110 the box. Supported on the rear wall of the box are two terminals 19- and --2O of one of two electric circuits in which the lamps l7 and .18 are disposed, the said terminal -19 being connected by the wife -21 with the lamp 17, through the latter with wire 22 which connects with one side 23- of an incomingfline. The latter connects also by means of the wire 22- and wires 24.-and 25 with each of the two lamps -18- illustrated.

The terminal connects by meansof the wire -26 with one of said lamps 27 to the other lamp -18-.

18' and through the latter with wire The reciprocating switch member 28 is connected by means of flexible cord 29.- with the other side of the incoming line.

The circuits are closed as follows: In the position shown in Fig. 4. the current passes from wire 29 to switch member 28- and terminal -20 wire 26-} to first lamp l8, through the latter to wire is rigidly mounted on a vertically reciprocating plunger -30" which passes through vopenings in horizontal projections 31- set screw being adjustable and locked against and 32 of a late 33 secured to'the rear wall of the box, the upper end portion of said plunger being of greater diameter than the lower end portion thereof, said larger end portion moving in a correspondingly larger openingin the projection 32.

compression spring --34- rests on the projection -31 and bears at its upper end against the shoulder -35-- on the lower end 0 the enlarged portion of said plunger thus serving to maintain said plunger normally at the upper limit of its movement; The

said enlarged portion of said plunger .30-'

projects through an opening-36- in the upper wall of the box and is adapted to be engaged by the lower end of a set screw 37 mounted in the lever 11, the said rotation after ad ustment by meaiis of the Mounted in the top which receives a thumb nut A frame 41- of strong cardboard or thin sheets of fiber or metal 1or 011111;;l suitable material avipg a eentra recta ar 0 nin ''-42- corresponding in with th ie plz e to be received therein is laid upon the'top wall of the box -.1 and is provided with per-{forawhich the apparatus will receive.

wall of the boir -'1- are threaded projections 39'- each of.

whereby it is held in place. A negative deposited upon the pane 3 within said opening 42- in the frame -4:1 is held against lateral movement in all directions. The presser plate 14 is of a size suiticiently large to cover the largest negative This feature of the construction may be modified, however, as shown in Figs. -1 and 5 in which two plates 43 provided adjacent their side edges with longitudinal slots 4:4: through each of which one of said projections 39- passes are adjustable towardand away from each other and are provided midway between the ends of their opposing edges with stepped recesses 45'. The variations in width of said recesses at different points are. in accordance with the variations in wvidth or length of, various standard sizes of photographic plates," so that any standard size plate may be received between said plates 43 and be held against lateral movement in any direction therebetween. Where said lates 43 are employed it is necessary to provide presser plates or boards 14. cori esponding in size .tions receiving the said projections -39 with the various standard sizes of photo-- graphic platcs. We prefer, to employ the frames 41' shown ;in Figs. land -3' for the reason that the latter are cheaper and generallyonly one of the same is needed as each operator usually uses: only one size of plate. I

The operation of our apparatus is as'follows: A frame 4:1-'having an opening adapted to receive a negative of same size is secured upon the top wall of the box 1 and the negative deposited upon the pane 3 within the opening of the frame. The lever 11 is normally supported in the position shown in Fig. 5 and when in said position the electric circuit through the lamp 17 is closed thus throwing a yellow light to which artificial-light papers such as Velox 'Cyko Nepera and Bromide are not sensitive. Unless it is desired to vignette or otherwise vary the print from an exact reproduction from the negative, a sheet of sensitized paper is laid upon the latter and the lever 11 is then depressed and is maintained in this position durin an interval suflicient toenable the rays of light from the lamp or lamps 1 to penetrate the sensitized surface'to a su cient depth to produceapicture of-desired tone. The depression of the lever opens the circuit through the lamp -17'- and closes the chicuit throu hthe lamp or lamps l8-. By releasing t e lever 11- the-last-named circuit is reopened and the circuit through the lamp 17- closed. The paper is now removed and another sheet placed on the negative and the operation repeated. If it is desired to use a vignette or-to dim the light thrown on a certain part of the negative to vary the print, it is necessary to adjust the vignette and other shadow throwing means before producing prints. The vignette -46 is deposited upon the pane l0, and the circuit is then closed through the lamp or lamps -18- by depressing the plunger 30 without depressing the lever 1l. For this purpose we provide an extension member -4c7-- for the plunger -30, said member consisting of a cylindrical piece of metal or other material having a central projection 4:8- at one end which enters the central opening 49 in the upper end of the plunger 30 and enables the latter to be depressed by pressure of the finger, a sufficient distance to throw the member --28 into engagement with the terminal 20. The said plunger is maintained depressed while the operator adjusts the vignette laterally after having adjusted the pane -10 to the elevation best suited to the attainment of the desired result. vignette may be adjusted by inserting the hand into'the opening 4 or by withdrawing the pane 10 and reinserting the same after the vignette has'been adjusted. Adjustment in one direction may be effected by merely .moving the pane 10 slightly without changing the position of the vignette thereon. After thus properly-adjusting the vignette the operation of printing as above described is followed.

The slides 6, 7 and -8 serve as means for ventilatin the box in order to prevent heating thereo to a higher degree.

For purposes of safety the box -1 is lined internally with asbestos paper 50 or similar fire-proof material.

The

\Ve claim as our invention:

A device of the kind specified, comprising a box provided in its top with a pane of glass upon which a negative is adapted to be supported, adjustable means engaging said negative to hold same against lateral movement, electric lamps of different colors within said box, two electric circuits controlling said lamps, a switch within the said box controlling said circuits, a spring opera-v tively engaging said switch to maintain one of said circuits normally closed and-the other open, there being'ventilating openings in the bottom and end walls respectively of said' box, supports for a second pane of glass at different elevations within said box above the lamps therein and in alinement with one of said' ventilating openings, a spring supported lever pivotally secured to said box at one end thereof, a set-screw therein adapted when said lever is depressed to operatively engage and actuate said switch against the action of its spring to close the normally open circuit and vice versa, there being a longitudinal slot in said lever, a member movable in said slot, and a presser board corresponding in size with the supported negative mounted on said movable member in said leverand adapted when the latter is depressed to press sensitized paper intouniform surface contact with said negative.

In testimony whereof we have signed our names in the presence of two subscribing witnesses.

' HENRY BURKE.

DAVID JAMES.

Witnesses:

- RUDOLPH WM. Lb'rz,

-' E. H. MAoDowELL. 

